RFR: Fix VirtualFlow performance regression in ListView scrolling

[Marius Hanl]

On Mon, 12 Jan 2026 09:56:41 GMT, Huang Xiao <duke at openjdk.org> wrote:

> I forgot to mention that since I'm just a regular user, I couldn't figure out how to become a member

You are an `Author`, so you should be able to login to https://bugs.openjdk.org/issues/?filter=39543.
See also the message from `@bridgekeeper`
> Welcome back youngledo

Without checking your example, simply removing both lines of code is certainly not the right fix. This was implemented to fix problems, so I'm pretty sure this will lead to regressions.

Also note that you should check if applying https://github.com/openjdk/jfx/pull/1945 fixes your problem, as this is an issue that could lead to many unnecessary relayouts right now.

Note that I believe that the performance of the `VirtualFlow` can be improved a lot, but I'm not sure this is the right approach / the right place. 
Example: the `removeAll` should not be triggered that often and the pile should not be that big. If it is, we may need to check out why this is first.

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PR Comment: https://git.openjdk.org/jfx/pull/2030#issuecomment-3739399553